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The process of breathing is made up of two components:

• Inhalation
• Exhalation

Inhalation is the process of filling the lungs with air. As they fill they expand and so th...

By inhibiting the enzyme acetylcholinesterase, the neurotransmitter acetylcholine does not get broken down. This causes acetylcholine to build up in the synapse between the motor neurones and muscles of r...

DEFINE: Key words What is a junction, what is a neurone and what is the nervous system? So, the nervous system connects all the nerve cells and fibres which transmit nerve impulses from one part of the bo...

Firstly you have a change away from optimum conditions, for instance a decrease in internal body temperature, which is detected by a receptor. The receptor relays this infromation down the communication p...

After the mRNA has exited the nucleus through the nuclear pores. Translation begins with the mRNA entering the ribosome. Next tRNA uses its three unpaired bases to bond with a specific amino and bring it ...